Formula: y_transform ~ x^transform_exp * length * predict2_0(r1, k, d, 
    kmercov, bias, x)

Parameters:
         Estimate Std. Error t value Pr(>|t|)    
d       0.000e+00  6.722e-01   0.000    1.000    
r1      1.115e-01  2.451e-01   0.455    0.649    
kmercov 2.532e+02  2.865e+00  88.365   <2e-16 ***
bias    0.000e+00  3.538e-01   0.000    1.000    
length  3.644e+04  1.996e+04   1.826    0.068 .  
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 288400 on 1995 degrees of freedom

Number of iterations to convergence: 27 
Achieved convergence tolerance: 1.49e-08